body, h1, h2, h3, h4, h5, h6, hr, p,blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input,textarea, th, td { margin:0; padding:0; }
body, button, input, select, textarea {font:12px/1.5tahoma, arial, \5b8b\4f53; }
h1, h2, h3, h4, h5, h6{ font-size:100%; }
address, cite, dfn, em, var {font-style:normal; }
code, kbd, pre, samp {font-family:couriernew, courier, monospace; }
small{ font-size:12px; }
ul, ol { list-style:none; }
a { text-decoration:none; }
a:hover { text-decoration:underline; }
sup { vertical-align:text-top; }
sub{ vertical-align:text-bottom; }
legend { color:#000; }
fieldset, img { border:0; }
button, input, select, textarea {font-size:100%; }
table { border-collapse:collapse;border-spacing:0; }
.App {
  text-align: center;
}

.App-logo {
  animation: App-logo-spin infinite 20s linear;
  height: 40vmin;
  pointer-events: none;
}

.App-header {
  background-color: #282c34;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: calc(10px + 2vmin);
  color: white;
}

.App-link {
  color: #61dafb;
}

.tab{
  width: 340px;
  height: 500px;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}
.tab .left{
  width: 30px;
  height: 50px;
  z-index: 30;
  position: absolute;
  left: 10px;
  top:200px;
  background: rgba(0, 0, 0, 0.5)
}
.tab .left::after{
  content: '';
  width: 14px;
  height: 5px;
  position: absolute;
  left: 22%;
  top: 53%;
  transform: rotate(225deg);
  background: white;
}

.tab .left::before{
  content: '';
  width: 14px;
  height: 5px;
  position: absolute;
  right: 30%;
  top: 40%;
  transform: rotate(-45deg);
  background: white;
}

.tab .right{
  width: 30px;
  height: 50px;
  z-index: 30;
  position: absolute;
  right: 10px;
  top:200px;
  background: rgba(0, 0, 0, 0.5)
}

.tab .right::after{
  content: '';
  width: 14px;
  height: 5px;
  position: absolute;
  right: 22%;
  top: 53%;
  transform: rotate(135deg);
  background: white;
}

.tab .right::before{
  content: '';
  width: 14px;
  height: 5px;
  position: absolute;
  right: 26%;
  top: 40%;
  transform: rotate(-135deg);
  background: white;
}

.tab .right:hover , .left:hover{
  background: rgba(100, 120, 35, 0.8)
}

.tab ul{
  height: 100%;
  transition: .3s;
  position: absolute;
}

.tab ul li{
  width: 340px;
  float: left;
  height: 100%;
}

.tab ul li img{
  width: 100%;
  height: 100%;
}

.tab ol{
  z-index: 20;
  position:absolute;
  bottom:16px;
  left: calc(50% - 75px);
  transform: scale(1);
  transition: .3s;

}
.tab ol li{
  width: 10px;
  height: 10px;
  float: left;
  background: white;
  margin: 10px; 
  border-radius: 50%;
  cursor: pointer;
}

.tab ol li.active{
  background: #61dafb;
  transform: scale(1.5)
}

.tab .line{
  /* width: 100%; */
  height: 10px;
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(255, 255, 255, 0.7);
  z-index: 20;
}


@keyframes App-logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
